Method of constructing a subway



April 13, 1937. w. CACCIA 2,077,353

METHOD OF CONSTRUCTING A SUBWAY Filed Nov. 2, 1956 INVENTOR (Val/G4,

BY 03W? aw Patented Apr. 13, 1937 UNITED STATES PATENT, OFFICE .METHOD or cons'rnuc'rmo A SUBWAY Walter Clccia, White Plains. N. Y., aalignor to John H. Unlandherm, New York, N. Y.

Application November 2, 1936, Serial No. 108,882

2 Claims.

vention claimed herein.

In this drawing the elevated structure, such as an elevated railroad or roadway, is indicated by the reference No. 1. This structure includes supporting columns 2 that are arranged longitudlnally and in transverse pairs. Normally these columns 2 are connected to the roadway of the elevated structure and extend through the earth that intervenes between the street surface 3 and the rock 4, usually having footings such as are indicated at 5 and also wheel guards 6 that are arranged above the surface of the street.

I contemplate, in carrying out this method, the excavating and removal of at least a portion of the earth that intervenes between the street surface 3 and the rock 4. After this earth has been removed, needle beams l are extended between and connected to the columns 2 within the space that has been created by the earth removal. Similar beams may be extended transversely between the members of the pairs of the columns 2.

Pits 8 are then formed below the alternate columns 2 in'the rock to points adjacent the lower level to which it is proposed to excavate theroclr. In other words, the pits may be extended to the proposed lower level or below or above it. Column extensions 8 are placed in these pits and are secured at ill in any suitable manner to the lower ends of the columns 2, these columns 8 finding footings at the lower ends of the pits.

If desired the columns, which are of less lateral dimensions than the lateral dimensions of the pits, may be surrounded by a shock buifer material l l which may be contained within a casing l2.

During the building of the subway, after the column extensions 9 have been put in place within the pits beneath the alternate columns 2 and the intervening columns 2 are supported by the needle beams l, the rock 4 may be blasted and removed to the lower,or sub-grade of the subway, without disturbing the column extensions I and without disturbing the intervening columns 2.

It is, of course, to be understood that should it be desired, the pits 8 may be created either before or after the placing of the needle beams I.

If these pits are sunk directly beneath the alternate columns 2, it will of course be necessary to support the elevated structure during the creation of these pits and this maybe done by placing false work. such as I have'conventionally indicated at it, cn cpposite sides of the column 6 being operated upon. which false work maybe removed when the column extension 9 has been put in place. Of course, if the pits 8 are placed somewhat laterally of the extension of the longitudinal line of the columns 2, this false work will be unnecessary because the column will be supported by the rock during the creation of the pit and until its load is assumed by the colcolumns 2 are caused to rest upon the roof'of the subway structure to support the elevated structure or new footings are created for this purpose.

Upon the assumption of the load of the columns 2 by the subway structure, the column extensions will be removed and if desired the needle beams maybe removed.

The space intervening between the normal street surface and the roof of the subway is then filled in and the street surface re-established.

Thus, with this method and this construction, the necessity for supporting each of the columns 2 by column extensions and the necessity for forming pits to receive these column extensions is obviated. In other words, it is only necessary to form pits below the alternate columns and to install column extensions within these pits, the load .of the intervening columns being assumed by the needle beams.

While this method and structure is admirably adapted for use when the subway ls'to be constructed through rock. it is nevertheless applicable to the construction of a subway through earth.

What I claim is:

1. In the method of supporting an elevated railroad structure that is normally supported by a plurality of columns arranged longitudinally on each side thereof and above rock that is to be removed, the steps of placing a temporary support beneath the elevated structure to support lesslateral dimensions than those of the pits withiri"said pits with their footings supported adjacent the lower ends of the pits whereby the extensions are free of the surrounding rock, transferring the load of the elevated structure to said extensions, and extending associated beams between the columns by which a street decking and service mains may be supported.

2. In the method of supporting an elevated railroad structure that is normally supported by a plurality of columns arranged longitudinally on each side thereof and above rock that is to be removed, the steps of placing a temporary support beneath the elevated structure to sup- 15 port the load of the same, creating pits in the rock on opposite sides of alternate columns and below the adjacent columns, which pits extend to points adjacent the lowermost level of the proposed rock removal, placing column extensions of less lateral dimensions than those of the pits within said pits with their footings supported adjacent the lower ends of the pits whereby the extensions are free of the surrounding rock, extending associated beams between the extensions to temporarily aid in supporting the alternate columns, removing said rock, erecting a subway structure within the space created by the rock removal, and transferring the load of said alternate columns to said subway structure.

WALTER, CACCIA.

DISCLAIMER 2,077 ,353.Walter Oaccia, White Plains, N. Y. METHOD OF OONSTRUCTING A SUBWAY. Patent dated April 13, 1937. Disclaimer filed February 5, 1941, by the assignee, John H. Unlandherm.

Hereby enters this disclaimer to claim 1 in'said patent.

[Oflicial Gazette March 4, 1941.] 

